Arithmetic Mean of Dataset {67, 79, 55, 61, 88}

Conditions

• The dataset consists of the values 67, 79, 55, 61, and 88.
• The mean is the simple average of these values.

Reasoning, step by step

1. Sum the data values: $67 + 79 + 55 + 61 + 88 = 350$.
2. Count the number of data points: $n = 5$.
3. Divide the sum by the count: $\mu = \frac{350}{5} = 70$.

Example

The video displays the calculation: $\mu = (67+79+55+61+88)/5 = 70$.

Common misconceptions

• Adding the values incorrectly.
• Dividing by the wrong number (e.g., 4 or 6).
• Confusing the mean with the median or mode.

Watch the explanation

Connected concepts

Explore next

• Why is the mean necessary for calculating variance?
• What is the median of this dataset?
• How does the mean serve as a balance point for the data?